hanging idle
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 4,043
Likes: 342
From: Central NJ
hanging idle
Guys,
I have a hanging idle in park when I rev the engine it goes up to whatever then stops for a second or two between 1200-1500 prior to it dropping to my idle at 775.......I did my research and did see what should be done and I just loaded a few updates(have not tested yet as I am working) but what is the main source or change that typically helps this most? Timing around the lower rpms, throttle follower, base idle airflow??? I had an updated tune due to the addition of a SC on a dyno, but I physically removed my MAF and that seemed to change things slightly......So I will certainly try what I found out so far, but any feedback is welcomed...Thanks
I have a hanging idle in park when I rev the engine it goes up to whatever then stops for a second or two between 1200-1500 prior to it dropping to my idle at 775.......I did my research and did see what should be done and I just loaded a few updates(have not tested yet as I am working) but what is the main source or change that typically helps this most? Timing around the lower rpms, throttle follower, base idle airflow??? I had an updated tune due to the addition of a SC on a dyno, but I physically removed my MAF and that seemed to change things slightly......So I will certainly try what I found out so far, but any feedback is welcomed...Thanks
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
THE VERY FIRST THINGS TO DO ARE:
1. Check for any un-metered air entering the engine
2. Vacuum leaks.
Check your long and short fuel trims. Report what they are.
Bill
1. Check for any un-metered air entering the engine
2. Vacuum leaks.
Check your long and short fuel trims. Report what they are.
Bill
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 4,043
Likes: 342
From: Central NJ
A&A V3SI supercharger
Running speed density
no MAF physically installed
car is setup rich up to but runs 14.7 at part throttle and idle
LTFT off
STFT hover +- 10 on average.... but generally closer to zero on average
auto tranny with 3200 stall
headers, ls6 intake ported TB...
Pump 93, no meth
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 4,043
Likes: 342
From: Central NJ
https://youtu.be/MxnnFDpy2-4
Here's a fix from the tuner school
Here's a fix from the tuner school
